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[[Image:Tek_502.jpg|200px|thumb|right|Image magnified out from a flyer]]
{{Oscilloscope Sidebar
|manufacturer=Tektronix
|series=
|model=502
|summary=1 MHz dual beam differential scope
|image=Tek 502 with x-y display.jpg
|caption=Tek 502 front (with Single Sweep Mod 104)
|introduced=1958
|discontinued=1973
|designers=Gary Vance
|manuals=
'''502'''
* [[Media:IM-502-1.pdf|502 (early) Instruction]]
* [[Media:070-090.pdf|502 (late) Instruction]]
'''502A'''
* [[Media:070-382.pdf|502A Instruction]]
* [[Media:070-0382-02.pdf|502A/RM502A (late) Instruction)]]
'''Calibration'''
* [[Media:Tek 502a fcp sn31k-up june 1969.pdf | Tektronix 502A sn 31,000-up Factory Calibration Procedure, June 1969]]
* [[Media:Tek 502a cal outline.pdf|502A Calibration Outline]]
}}
The '''Tektronix 502''' is a dual-beam oscilloscope [[introduced in 1958]], followed by the 502A in 1963. There is also a rack-mount model, the RM502A.


The 502 is a dual-beam oscilloscope with a high sensitivity of 100 or 200 microvolts/cm,
Both beams have differential inputs.  The horizontal deflection plates are common to both beams.   
depending on the mode whether differential inputs are used.
At 200uV/cm the bandwidth is only 100kHz but at 200mV/cm it rises to 1MHz.
There is a 502, a 502A, and an RM502A.  There is a transistor-regulated heater supply build in.


Price at July 1959 was $825.
Mod 104 on a 502 provides single sweep lockout. This feature is standard on the 502A, which also has beam finder switches for each channel.


Mod 104 on a 502 provides single sweep lockout.
A recessed switch in the left side panel allows the upper beam amplifier to be connected to the horizontal deflection plates for single-beam X-Y operation, providing a differential X input with the same sensitivity as the Y channel.  The upper beam is positioned off screen in this mode.


* [http://w140.com/tek_502.pdf Tektronix 502 Manual (PDF)]
If the combination of time base setting and magnification selector results in a sweep faster than 1 μs/div, the horizontal scale is not calibrated, and a lamp on the front panel lights up to remind the operator of that.
* [http://bama.edebris.com/download/tek/502a/tek%20502a.v6.pdf Tektronix 502A Manual (PDF)]
{{BeginSpecs}}
{{Spec | Deflection | 100 μV/cm to 20 V/cm, 1−2−5, ±3% }}
{{Spec | Bandwidth | 1 MHz @ 200 mV/cm and above; 400 kHz @ 50 mV/cm, 200 kHz @ 5 mV/cm, 100 kHz @ 200 μV/cm }}
{{Spec | CMRR | 502A: 40,000:1 @ 100 mV/cm and 1 kHz }}
{{Spec | Input impedance | 1 MΩ // 47 pF }}
{{Spec | Sweep | 1 μs/cm to 5 s/cm, 1−2−5, ±3%; magnifier ×2, ×5, ×10 or ×20 }}
{{Spec | CRT | Early 502: Type [[T60P2]]/[[T502P2]]/[[T5020P2]];<br />Late 502, 502A: Type [[T5021P2]];<br />(P1, P7 or P11 were available as options)<br />10 vertical and 10 horizontal 1 cm divisions<br />3 kV acceleration }}
{{Spec | Dimensions | 597 mm (23½") × 286 mm (11¼") × 381 mm (15") L×W×H }}
{{spec | Weight | 23.6 kg (52lb) }}
{{EndSpecs}}


==Links==
{{Documents|Link=502}}
{{Documents|Link=502A}}
* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/502A.htm Tektronix 502A] @ amplifier.cd (many internal pictures)
* [https://youtu.be/0D-z6_M76Ls Tektronix 502A internals] @ youtube (German)
==Prices==
{| class="wikitable"
|-
! Year
! 1959
! 1961
! 1963 (A)
! 1971 (A)
|-
! Catalog price
|align=right|  $825
|align=right|  $825
|align=right| $1,050
|align=right| $1,265
|-
! In 2023 Dollars
|align=right| $8,700
|align=right| $8,500
|align=right| $10,500
|align=right| $9,600
|-
|}
==Internals==
The −150 V supply uses a [[5651]] voltage reference tube as its reference.
The 6.2 V<sub>DC</sub> heater supply for the tubes in the first stage differential amplifier is transistor-regulated. 
This heater supply uses the −150 V supply as its reference. 
There is no post-deflection acceleration. The CRT cathode voltage is −2.9 kV.
The early 502 uses a single supply for the upper beam and lower beam CRT cathodes (HV transformer [[120-114]]). 
Later models (1959+, see [[Media:070-090.pdf|070-090]]) and the 502A have separate supplies for the two CRT cathodes (HV transformer [[120-150]]).
This improvement allows slight differences in horizontal CRT sensitivity between
the two beams to be cancelled out in step 8 of the calibration procedure.
Later 502A models have a solid state (plus [[nuvistor]]) input stage,
a [[6DJ8]] as the deflection amplifier, and transistors as amplifiers and emitter followers (only in the newest version).
The 502 has a 123 °F (50.5 °C) [[thermal cutoff]] switch.
==Pictures==
===502===
<gallery>
Tek 502 with x-y display.jpg    | 502 with (single-beam) X-Y display
Tek_502_front.jpg                | 502 Mod.104 (single sweep), front
Tek 502 front fl.jpg            | 502 Mod.104 (single sweep), front from lower left
Tek 502 left.jpg                | 502 left interior
Tek 502 right.jpg                | 502 right interior
502 amplifier shock mount.jpg    | rubber shock mount of amplifier sub-chassis
Tek 502 bottom.jpg              | 502 bottom
Tek 502 trace.jpg                | 502 trace
Tek 502 trace2.jpg              | 502 trace
Tek 502 front panel wo knobs.jpg | 502 front panel without knobs
502 power supply operating.jpg  | 502 power supply section in operation
</gallery>
===502A===
<gallery>
Wellenkino_502a_011.jpg|502A
Tek 502a right internal.jpg|502A right internal
Tek 502a right.jpg|502A right
Tek 502a left.jpg|502A left
Tek 502a rear.jpg|502A rear
502A_Solidstate.JPG| Solid-state input stage with two 6DJ*
Tek 502a sn25997 to 30999 vert amp.jpg|502A vertical amp sn 25,997 to 30,999
</gallery>
===RM502A===
<gallery>
<gallery>
Image:Tek_502_front.jpg|502 front view
Tek rm502a 2 1.jpg | RM502A
Image:Tek 502a block.png|502A block diagram
Tek rm502a 2 2.jpg | RM502A rear
Image:Tek rm 502a front.jpg|RM 502A
Tek rm 502a front.jpg|RM 502A
Image:Rm 502a display.jpg|RM 502A display
Rm 502a display.jpg|RM 502A display
Image:Rm502a bottom2.jpg|RM 502A bottom
Rm502a bottom2.jpg|RM 502A bottom
Image:Rm502a transformer wiring.jpg|RM 502A transformer wiring
Rm502a transformer wiring.jpg|RM 502A transformer wiring
Image:Rm502a top.jpg|RM 502A top
Rm502a top.jpg|RM 502A top
Image:Rm502a floating pre.jpg|RM 502A vibration-isolated vertical amp
Rm502a floating pre.jpg|RM 502A vibration-isolated vertical amp
</gallery>
</gallery>
=== Third version 502A, serial number ≥31,000 ===
<gallery>
Tek 502a last generation attenuator.jpg|top side lower beam input amp and attenuator, bottom side of upper beam vert input board
RM502A Left Side with HV covers.JPG|late model RM502A
RM502A Right Side.JPG|late model RM502A
RM502A Bottom.JPG|late model RM502A
RM502A Left Side with covers and bracket removed.JPG|late model RM502A
RM502A Upper Beam Vertical Preamp.JPG|late model RM502A
RM502A Top, looking onto the lower beam preamp.JPG|late model RM502A
RM502A Top.JPG|late model RM502A
</gallery>
===Diagrams===
<gallery>
Tek 502a block.png              | 502A block diagram
Tek-502a vert.png              | 502A vertical amplifier
Tek 502 crt circuit.png        | Early 502 CRT circuit, [[120-114]] transformer (secondary transformer pin numbers incorrect)
Tek 502 crt circuit 070-090.png | Later 502 CRT circuit, [[120-150]] transformer
Tek 502a hvps.png              | 502A CRT circuit, [[120-150]] transformer
502-mountain-climber.png        | [[Tektronix Cartoons|Cartoon]] in schematic: Mountain Climber
</gallery>
===Applications===
<gallery>
Tek 502A in Physiology Lab.jpg | Tek 502A in a Physiology lab
</gallery>
==Components==
{{Parts|502}}
{{Parts|502A}}
[[Category:Dual beam scopes]]
[[Category:Monolithic tube scopes]]

Latest revision as of 15:20, 9 March 2024

Tektronix 502
1 MHz dual beam differential scope
Tek 502 front (with Single Sweep Mod 104)

Produced from 1958 to 1973

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix 502 is a dual-beam oscilloscope introduced in 1958, followed by the 502A in 1963. There is also a rack-mount model, the RM502A.

Both beams have differential inputs. The horizontal deflection plates are common to both beams.

Mod 104 on a 502 provides single sweep lockout. This feature is standard on the 502A, which also has beam finder switches for each channel.

A recessed switch in the left side panel allows the upper beam amplifier to be connected to the horizontal deflection plates for single-beam X-Y operation, providing a differential X input with the same sensitivity as the Y channel. The upper beam is positioned off screen in this mode.

If the combination of time base setting and magnification selector results in a sweep faster than 1 μs/div, the horizontal scale is not calibrated, and a lamp on the front panel lights up to remind the operator of that.

Key Specifications

Deflection 100 μV/cm to 20 V/cm, 1−2−5, ±3%
Bandwidth 1 MHz @ 200 mV/cm and above; 400 kHz @ 50 mV/cm, 200 kHz @ 5 mV/cm, 100 kHz @ 200 μV/cm
CMRR 502A: 40,000:1 @ 100 mV/cm and 1 kHz
Input impedance 1 MΩ // 47 pF
Sweep 1 μs/cm to 5 s/cm, 1−2−5, ±3%; magnifier ×2, ×5, ×10 or ×20
CRT Early 502: Type T60P2/T502P2/T5020P2;
Late 502, 502A: Type T5021P2;
(P1, P7 or P11 were available as options)
10 vertical and 10 horizontal 1 cm divisions
3 kV acceleration
Dimensions 597 mm (23½") × 286 mm (11¼") × 381 mm (15") L×W×H
Weight 23.6 kg (52lb)

Links

Documents Referencing 502

(no results)

Documents Referencing 502A

Document Class Title Authors Year Links
Service Scope 42 Feb 1967.pdf Article Simplify Waveform Measurements 1967 502A

Prices

Year 1959 1961 1963 (A) 1971 (A)
Catalog price $825 $825 $1,050 $1,265
In 2023 Dollars $8,700 $8,500 $10,500 $9,600

Internals

The −150 V supply uses a 5651 voltage reference tube as its reference.

The 6.2 VDC heater supply for the tubes in the first stage differential amplifier is transistor-regulated. This heater supply uses the −150 V supply as its reference.

There is no post-deflection acceleration. The CRT cathode voltage is −2.9 kV.

The early 502 uses a single supply for the upper beam and lower beam CRT cathodes (HV transformer 120-114). Later models (1959+, see 070-090) and the 502A have separate supplies for the two CRT cathodes (HV transformer 120-150). This improvement allows slight differences in horizontal CRT sensitivity between the two beams to be cancelled out in step 8 of the calibration procedure.

Later 502A models have a solid state (plus nuvistor) input stage, a 6DJ8 as the deflection amplifier, and transistors as amplifiers and emitter followers (only in the newest version).

The 502 has a 123 °F (50.5 °C) thermal cutoff switch.

Pictures

502

  • 502 with (single-beam) X-Y display

    502 with (single-beam) X-Y display

  • 502 Mod.104 (single sweep), front

    502 Mod.104 (single sweep), front

  • 502 Mod.104 (single sweep), front from lower left

    502 Mod.104 (single sweep), front from lower left

  • 502 left interior

    502 left interior

  • 502 right interior

    502 right interior

  • rubber shock mount of amplifier sub-chassis

    rubber shock mount of amplifier sub-chassis

  • 502 bottom

    502 bottom

  • 502 trace

    502 trace

  • 502 trace

    502 trace

  • 502 front panel without knobs

    502 front panel without knobs

  • 502 power supply section in operation

    502 power supply section in operation

502A

  • 502A

    502A

  • 502A right internal

    502A right internal

  • 502A right

    502A right

  • 502A left

    502A left

  • 502A rear

    502A rear

  • Solid-state input stage with two 6DJ*

    Solid-state input stage with two 6DJ*

  • 502A vertical amp sn 25,997 to 30,999

    502A vertical amp sn 25,997 to 30,999

RM502A

  • RM502A

    RM502A

  • RM502A rear

    RM502A rear

  • RM 502A

    RM 502A

  • RM 502A display

    RM 502A display

  • RM 502A bottom

    RM 502A bottom

  • RM 502A transformer wiring

    RM 502A transformer wiring

  • RM 502A top

    RM 502A top

  • RM 502A vibration-isolated vertical amp

    RM 502A vibration-isolated vertical amp

Third version 502A, serial number ≥31,000

  • top side lower beam input amp and attenuator, bottom side of upper beam vert input board

    top side lower beam input amp and attenuator, bottom side of upper beam vert input board

  • late model RM502A

    late model RM502A

  • late model RM502A

    late model RM502A

  • late model RM502A

    late model RM502A

  • late model RM502A

    late model RM502A

  • late model RM502A

    late model RM502A

  • late model RM502A

    late model RM502A

  • late model RM502A

    late model RM502A

Diagrams

  • 502A block diagram

    502A block diagram

  • 502A vertical amplifier

    502A vertical amplifier

  • Early 502 CRT circuit, 120-114 transformer (secondary transformer pin numbers incorrect)

    Early 502 CRT circuit, 120-114 transformer (secondary transformer pin numbers incorrect)

  • Later 502 CRT circuit, 120-150 transformer

    Later 502 CRT circuit, 120-150 transformer

  • 502A CRT circuit, 120-150 transformer

    502A CRT circuit, 120-150 transformer

  • Cartoon in schematic: Mountain Climber

    Cartoon in schematic: Mountain Climber

Applications

  • Tek 502A in a Physiology lab

    Tek 502A in a Physiology lab

Components

Some Parts Used in the 502

Part Part Number(s) Class Description Used in
120-117 120-117 Discrete component power transformer 502
12AT7 154-0039-00 Vacuum Tube (Dual Triode) dual high-gain triode 161 • 180 • 310 • 310A • 315 • 316 • 360 • 502 • 502A • 511A • 512 • 513 • 513D • 514 • 514AD • 514D • 516 • 524 • 529 • RM529 • 544 • 546 • 547 • 556 • 565 • 570 • 3A2 • 75 • 3A75 • 1M1 • A • B • C • G • H • K • L • ML • M • N • K • R • S • Z • Keithley 610B
12AU7 154-041 • 154-0041-00 • 154-0287-00 Vacuum Tube (Dual Triode) dual medium-μ triode 104 • 104A • 122 • 160 • 161 • 162 • 181 • 190 • 310 • 310A • 316 • 317 • 3C66 • 502 • 502A • 507 • 511A • 512 • 516 • 517 • 517A • 524 • 526 • 535 • 536 • 545 • 545A • 545B • 547 • 549 • 555 • 561 • 564 • 570 • 575 • 581 • 581A • 585 • 585A • C • D • E • N • Q • Hickok 1825
12B4 154-044 • 154-0044-00 Vacuum Tube (Triode) power triode 126 • 310 • 310A • 316 • 317 • 502 • 502A • 524 • 526 • 541 • 541A • 535 • 535A • 545 • 545A • 546 • 547 • 570 • 549 • 551 • 555 • 513 • 581 • 581A • 585 • 585A • Keithley 610
2N301 151-0001-00 Discrete component germanium PNP power transistor 502 • 502A
5642 154-0051-00 • 154-0079-00 Vacuum Tube (Diode) directly-heated high-voltage rectifier 310 • 310A • 316 • 317 • 360 • 453 • 502 • 502A • 503 • 504 • 506 • 513 • 515 • 516 • 524 • 529 • RM529 • 533 • 533A • 535 • 536 • 543 • 543A • 543B • 545 • 545A • 545B • 547 • 551 • 555 • 556 • 560 • 561 • 561A • 561S • 564 • 567 • 570 • 575 • 581 • 581A • 585 • 585A • 647 • 647A
5651 154-052 • 154-0052-00 • 154-0288-00 Gas Discharge Tube (Voltage regulator) 87 V voltage reference 128 • 160 • 310 • 310A • 502 • 503 • 504 • 511A • 512 • 516 • 517 • 524 • 526 • 531 • 531A • 535 • 536 • 541 • 541A • 543 • 543A • 543B • 545 • 545A • 545B • 570 • 549 • 581 • 581A • 585 • 585A
5AR4 154-0168-00 Vacuum Tube (Dual Rectifier) dual rectifier 502 • 502A • 160
6AL5 154-016 • 154-0016-00 • 154-0038-00 Vacuum Tube (Dual Diode) high-perveance dual diode 163 • 181 • 190 • 1M1 • 310 • 310A • 315 • 316 • 317 • 3B1 • 3B1S • 3B2 • 3B3 • 3B5 • 502 • 502A • 503 • 511 • 511A • 512 • 516 • 517 • 517A • 524 • 526 • 535 • 535A • 545 • 545A • 549 • 551 • 565 • 570 • 581 • 581A • 585 • 585A • C • T • Telequipment D52 • Telequipment D56 • Telequipment S52
6AN8 154-078 • 154-0078-00 Vacuum Tube (Triode/Pentode) triode-pentode combo 310 • 310A • 316 • 317 • 360 • 502 • 502A • 516 • 517 • 517A • 526 • 565 • 570 • 575 • N
6AU6 154-0022-00 • 157-0073-00 • 157-0059-00 • 154-0284-00 Vacuum Tube (Pentode) RF pentode 107 • 160 • 181 • 190 • 60 • 2A60 • 72 • 3A72 • 3C66 • 310 • 310A • 316 • 317 • 360 • 502 • 502A • 506 • 511 • 511A • 512 • 513 • 516 • 517 • 517A • 524 • 526 • 529 • RM529 • 531 • 531A • 535 • 536 • 545 • 545A • 546 • 547 • 549 • 555 • 561 • 561A • 561S • 564 • 565 • 567 • 570 • 575 • 581 • 581A • 585 • 585A • 80 • C • CA • Q
6BW4 154-0119-00 Vacuum Tube (Dual Diode) dual diode 126 • 502 • 502A • 524 • 575
6CZ5 154-0167-00 Vacuum Tube (Pentode) power pentode 317 • 502 • 506 • 526 • 555 • 561 • 561A • 561S • 564 • 565 • 567
6DJ8 154-0187-00 • 154-0305-00 Vacuum Tube (Dual Triode) dual triode 067-506 • 111 • 132 • 161 • 310A • 316 • 317 • 502 • 502A • 503 • 504 • 506 • 515 • 516 • 519 • 526 • 529 • RM529 • 533 • 535 • 536 • 543 • 544 • 545 • 545A • 545B • 546 • 547 • 549 • 555 • 556 • 561A • 561S • 564 • 565 • 567 • 581 • 581A • 585 • 585A • 661 • 1A4 • 1S1 • 60 • 2A60 • 63 • 2A63 • 67 • 2B67 • 3A1 • 3A1S • 3A2 • 3A3 • 3A6 • 3A7 • 72 • 3A72 • 75 • 3A75 • 4S2 • 51 • 3B1 • 3B1S • 3B2 • 3B3 • 3B4 • 3M1 • 3S76 • 3T77 • 3T77A • 9A1 • 9A2 • 1121 • 80 • 81 • 82 • 86 • B • O • W • Z • Telequipment D56 • Telequipment S32A • Telequipment D52 • S-311 • Telequipment TD51 • Telequipment S52 • Telequipment S51 • Telequipment Type A • TU-4
8056 154-0417-00 Vacuum Tube (Triode) low-voltage Nuvistor triode 422 • 502 • W • 1S1 • 3A7 • 3S3 • 3T4 • 5T3 • 10A1
T502 154-0144-00 • 154-144 • 154-0170-00 • 154-170 • 154-0172-00 • 154-172 • 154-0173-00 • 154-173 • 154-0269-00 • 154-269 • 154-0270-00 • 154-270 • 154-0271-00 • 154-271 • 154-0272-00 • 154-272 • 154-0273-00 • 154-273 • 154-0274-00 • 154-274 • 154-0275-00 • 154-275 • 154-0276-00 • 154-276 • 154-0348-00 CRT dual-beam CRT 502


Some Parts Used in the 502A

Part Part Number(s) Class Description Used in
12AT7 154-0039-00 Vacuum Tube (Dual Triode) dual high-gain triode 161 • 180 • 310 • 310A • 315 • 316 • 360 • 502 • 502A • 511A • 512 • 513 • 513D • 514 • 514AD • 514D • 516 • 524 • 529 • RM529 • 544 • 546 • 547 • 556 • 565 • 570 • 3A2 • 75 • 3A75 • 1M1 • A • B • C • G • H • K • L • ML • M • N • K • R • S • Z • Keithley 610B
12AU7 154-041 • 154-0041-00 • 154-0287-00 Vacuum Tube (Dual Triode) dual medium-μ triode 104 • 104A • 122 • 160 • 161 • 162 • 181 • 190 • 310 • 310A • 316 • 317 • 3C66 • 502 • 502A • 507 • 511A • 512 • 516 • 517 • 517A • 524 • 526 • 535 • 536 • 545 • 545A • 545B • 547 • 549 • 555 • 561 • 564 • 570 • 575 • 581 • 581A • 585 • 585A • C • D • E • N • Q • Hickok 1825
12B4 154-044 • 154-0044-00 Vacuum Tube (Triode) power triode 126 • 310 • 310A • 316 • 317 • 502 • 502A • 524 • 526 • 541 • 541A • 535 • 535A • 545 • 545A • 546 • 547 • 570 • 549 • 551 • 555 • 513 • 581 • 581A • 585 • 585A • Keithley 610
151-0261-00 151-0261-00 Discrete component dual PNP transistor AM501 • AM502 • CG5001 • CG551AP • FG501 • FG502 • FG503 • OF150 • OF151 • OF152 • OF235 • OS261 • RM502A • R1140 • R5030 • R5031 • R7912 • 067-0679-00 • 067-0807-00 • 1101 • 1140A • 1141 • 1142 • 1350 • 145 • 1450 • 1480 • 1481 • 1482 • 1485 • 1501 • 1801 • 1900 • 1910 • 1980 • 213 • 26A1 • 26A2 • 2620 • 285 • 3A9 • 3A10 • 3S1 • 3S2 • 3S5 • 3S6 • 432 • 434 • 4501 • 454 • 4601 • 4602 • 4610 • 4612 • 4620 • 4632 • 4634 • 4701 • 475 • 492 • 492A • 492AP • 494 • 494P • 496 • 496P • 5A13N • 5A20N • 5A21N • 5A22N • 5A26 • 5L4N • 502A • 5030 • 5031 • 576 • 690SR • 7A22 • 7A29 • 7B51 • 7B71 • 7J20 • 7L5 • 7S11 • 7S12 • 7912AD
2N301 151-0001-00 Discrete component germanium PNP power transistor 502 • 502A
5642 154-0051-00 • 154-0079-00 Vacuum Tube (Diode) directly-heated high-voltage rectifier 310 • 310A • 316 • 317 • 360 • 453 • 502 • 502A • 503 • 504 • 506 • 513 • 515 • 516 • 524 • 529 • RM529 • 533 • 533A • 535 • 536 • 543 • 543A • 543B • 545 • 545A • 545B • 547 • 551 • 555 • 556 • 560 • 561 • 561A • 561S • 564 • 567 • 570 • 575 • 581 • 581A • 585 • 585A • 647 • 647A
5AR4 154-0168-00 Vacuum Tube (Dual Rectifier) dual rectifier 502 • 502A • 160
6AL5 154-016 • 154-0016-00 • 154-0038-00 Vacuum Tube (Dual Diode) high-perveance dual diode 163 • 181 • 190 • 1M1 • 310 • 310A • 315 • 316 • 317 • 3B1 • 3B1S • 3B2 • 3B3 • 3B5 • 502 • 502A • 503 • 511 • 511A • 512 • 516 • 517 • 517A • 524 • 526 • 535 • 535A • 545 • 545A • 549 • 551 • 565 • 570 • 581 • 581A • 585 • 585A • C • T • Telequipment D52 • Telequipment D56 • Telequipment S52
6AN8 154-078 • 154-0078-00 Vacuum Tube (Triode/Pentode) triode-pentode combo 310 • 310A • 316 • 317 • 360 • 502 • 502A • 516 • 517 • 517A • 526 • 565 • 570 • 575 • N
6AU6 154-0022-00 • 157-0073-00 • 157-0059-00 • 154-0284-00 Vacuum Tube (Pentode) RF pentode 107 • 160 • 181 • 190 • 60 • 2A60 • 72 • 3A72 • 3C66 • 310 • 310A • 316 • 317 • 360 • 502 • 502A • 506 • 511 • 511A • 512 • 513 • 516 • 517 • 517A • 524 • 526 • 529 • RM529 • 531 • 531A • 535 • 536 • 545 • 545A • 546 • 547 • 549 • 555 • 561 • 561A • 561S • 564 • 565 • 567 • 570 • 575 • 581 • 581A • 585 • 585A • 80 • C • CA • Q
6BW4 154-0119-00 Vacuum Tube (Dual Diode) dual diode 126 • 502 • 502A • 524 • 575
6DJ8 154-0187-00 • 154-0305-00 Vacuum Tube (Dual Triode) dual triode 067-506 • 111 • 132 • 161 • 310A • 316 • 317 • 502 • 502A • 503 • 504 • 506 • 515 • 516 • 519 • 526 • 529 • RM529 • 533 • 535 • 536 • 543 • 544 • 545 • 545A • 545B • 546 • 547 • 549 • 555 • 556 • 561A • 561S • 564 • 565 • 567 • 581 • 581A • 585 • 585A • 661 • 1A4 • 1S1 • 60 • 2A60 • 63 • 2A63 • 67 • 2B67 • 3A1 • 3A1S • 3A2 • 3A3 • 3A6 • 3A7 • 72 • 3A72 • 75 • 3A75 • 4S2 • 51 • 3B1 • 3B1S • 3B2 • 3B3 • 3B4 • 3M1 • 3S76 • 3T77 • 3T77A • 9A1 • 9A2 • 1121 • 80 • 81 • 82 • 86 • B • O • W • Z • Telequipment D56 • Telequipment S32A • Telequipment D52 • S-311 • Telequipment TD51 • Telequipment S52 • Telequipment S51 • Telequipment Type A • TU-4
6DT5 154-0302-00 Vacuum Tube (Pentode) power pentode 502A
T5021 154-0245-00 • 154-245 • 154-0246-00 • 154-246 • 154-0247-00 • 154-247 • 154-0248-00 • 154-248 • 154-0249-00 • 154-249 • 154-0250-00 • 154-250 • 154-0280-00 • 154-280 • 154-0281-00 • 154-280 CRT dual-beam CRT 502A
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